Telegraph-repeater



P. OATLIN. Telegraph Repeater.

No. 231,477, Patented Aug. 24, 1880.

dimmka wliw m Gama/422 NPErERs, PHOTOMTMOGRAHEH. WASHINGTON, D C.

. UNITED STATES PATENT OFFICE.

FREDERICK GATLIN, OF BROOKLYN, NEW YORK.

TELEGRAPH-REPEATER.

SPECIFICATION forming part of Letters Patent No. 231,477, dated August 24, 1880,

Application filed February 2, 1880.

To all whom it may concern Be it known that I, FREDERICK GATLIN, of

- Brooklyn, in the county of Kings and State of New York, have invented an Improvement in Telegraph-Repeaters, of which the following is a specification.

My invention consists in a repeating-instrument that works in the main lines and will relay the message coming from either direction, and that entirely independent of the polarity ot' the current, and without the use of any relay-Sounders or local batteries, and I accom plish with two electro-magnets what has usually required six of said magnets; and my instrument is very simple and not liable to get out of order, and it is automatic, and can be used on any through or way Morse circuit.

In the drawing my invention is represented by a diagram showing the instrument and connections.

The electromagnets a and I) act in opposite directions on the armature 0. These magnets might be placed side by side and act upon an armature that forms a T to thelevcr d; but I a prefer to have the poles facing each other, with the armature a between them. The le er d swings upon the fulcrum c.

The right-angled levers fand g upon the pivots 2 3 are provided with springs 4t and 5 and stops 6 and 7, and they act against the cross-pin t' of the lever 01, and the tension of the springs is regulated and the position of the stops 6 and 7 so adjusted that the armature-faces will be at the proper distances from the ends of the cores, and the levers f and y will always bear upon the two ends of the pin 17, except when the magnetic force in a and bis changed by the line-currents passing through the helices. The levers l and 'n on pivots 10 11, with springs 12 13 and screw-stops 14: 15, are provided in connection with the insulated pins or studs 0 of the armature-lever cl.

The line E passes from the distant station, where thereis a battery, B, key K, and ground G, to the screw 15; thence through a, 11, and wire r to the magnet 1), battery 8, and ground t. The line W passes from the other distant station, where there is a ground, G, battery B, and key K, to the screw 14, and by Z and 10, through 1, to a, and thence to battery 8 and ground t.

There are ground-connections x w from the pins 0, (which are preferably insulated,) said ground-circuits having rheostats R Rin them, and these are adjusted to have about the same resistance as theline-circuits. The line-circuits being closed at the keys K K, and the levers Zn not being in contact with 0, the currents through the helices a b act equally and the armature-lever remains in a central and nor-- mal position. If, now, the key K is operated, the line-circuit W is broken and the attraction of b overpowers a, and the lever d moves toward 1) and carries with it lever 01,, separating the same from the stop 15 and breaking the circuit between the line E and screw 15, and hence giving the same signal to any telegraphinstrument in the circuit E that has been given in W; and in order to maintain a current through the helix of b, and preventthe breaking of the current of b at 15 demagnetizing the magnet b, I establish a new route for the current from 8, through D r11 n 0 a" and rheostat- It, to earth, thus causing the magnet I) to continue in action and keep the circuit of E broken at 15 as long as the circuit of W is broken at K. When the circuit of W is again closed at K the circuit of E is closed at 15, because the equal currents are established in c and b. If the key K is operated and the circuit of E broken, the magnet a causes the circuit of W to be broken at 14, and the artificial line 00 causes the current from S to continue in a, so that any message coming in either direction is repeated into the other circuit with the utmost accuracy, the one repeating-instrument operating in either direction.

I make use of the armature-lever cl to operate a local circuit and sounder in cases where it is desired to have the same at the station for use with this repeater. This local circuit is shown at 'v by dotted lines, with the sounder s and local battery L B, the wires being connected at 2 and 3. Hence in the normal condition the local circuit w1ll be closed through y if, but when the lever moves either way the circuit is broken either between@' and g or between f and '5. Hence the sounder s responds to either key K or K.

I claim as my invention- 1. The combination, in a repeating-instrument, of two electro-magnets and the line and levers l n, and line-circuit and ground-connections, and leversfg, and local circuit and soundor, substantially as set forth.

Signed by me this 28th day of January, A.

F. GATLIN.

Witnesses:

G120. T. PINGKNEY, WILLIAM G. MOTT. 

